-89.23% is the change from 520 to 56
Calculation steps:
[( 56 - 520 ) ÷ 520] x 100 = -89.23%
Formula
Percentage change = [(56 - 520) / 520] x 100
Subtract the new number by the original number
56 - 520 = -464
-464 ÷ 520 = -0.8923076923076924
-0.8923076923076924 x 100 = -89.23%